U023E — Lost Communication With Cruise Control Front Distance Range Sensor Right

U023E — Lost Communication With Cruise Control Front Distance Range Sensor Right. A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: damaged CAN bus wiring or short to power/ground, a faulty module pulling the bus down, corroded connectors, especially in wet areas.

vehicle network

Is it safe to drive?

Drive with caution Depends on what is affected. A single dead convenience module is fine to drive with; loss of communication with engine, braking or steering modules is not. If multiple critical systems drop out, do not drive.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm U023E is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the vehicle network (CAN bus) communication for damage, corrosion, chafing or poor contact.
  4. Subsystem check Measure resistance between CAN-High and CAN-Low at the OBD port with power off — about 60 Ω is healthy.
  5. Subsystem check Scan all modules: the one that does not respond is either the culprit or downstream of the break.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U023E does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for U023E (parts and labor, USD, independent shop rates): Repair CAN wiring or connectors: $100–$400; Remove interfering aftermarket device: $0–$150; Replace the faulty control module: $300–$1,500. Overall, fixing U023E usually costs between $0 and $1,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How do I diagnose U023E myself?

Start with a scan: confirm U023E, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the vehicle network (CAN bus) communication, and verify the suspect component against live data before buying parts.

Is it safe to drive with U023E?

Depends on what is affected. A single dead convenience module is fine to drive with; loss of communication with engine, braking or steering modules is not. If multiple critical systems drop out, do not drive.

How much does it cost to fix U023E?

Repair CAN wiring or connectors — $100–$400; Remove interfering aftermarket device — $0–$150; Replace the faulty control module — $300–$1,500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

Will U023E clear itself?

Sometimes U023E clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of U023E?

The most common causes are: damaged CAN bus wiring or short to power/ground, a faulty module pulling the bus down, corroded connectors, especially in wet areas.

What does U023E mean?

The engine control module sets U023E when it detects a fault in the vehicle network (CAN bus) communication. In practical terms: lost communication with cruise control front distance range sensor right. The code belongs to the vehicle network group of OBD2 codes.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores U023E and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

Common symptoms of U023E

  • random, hard-to-reproduce electrical glitches
  • no-start or intermittent starting in some cases
  • intermittent loss of functions (gauges, windows, steering assist)
  • multiple warning lights on at once
  • modules intermittently not communicating with the scanner

What causes U023E?

  • corroded connectors, especially in wet areas
  • damaged CAN bus wiring or short to power/ground
  • a faulty module pulling the bus down
  • water ingress in harness junctions
  • aftermarket equipment interfering with the bus

How to diagnose U023E

  1. Connect an OBD2 scanner, confirm U023E is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the vehicle network (CAN bus) communication for damage, corrosion, chafing or poor contact.
  4. Measure resistance between CAN-High and CAN-Low at the OBD port with power off — about 60 Ω is healthy.
  5. Scan all modules: the one that does not respond is either the culprit or downstream of the break.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U023E does not return.

How to fix U023E

Start with the cheapest and most common causes before replacing expensive parts:

  • Repair CAN wiring or connectors — $100–$400
  • Remove interfering aftermarket device — $0–$150
  • Replace the faulty control module — $300–$1,500

How much does it cost to fix U023E?

Repair cost depends on which component actually failed. Typical scenarios for U023E (parts and labor, USD, independent shop rates):

  • Repair CAN wiring or connectors: $100–$400
  • Remove interfering aftermarket device: $0–$150
  • Replace the faulty control module: $300–$1,500

Overall, fixing U023E usually costs between $0 and $1,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with U023E?

Depends on what is affected. A single dead convenience module is fine to drive with; loss of communication with engine, braking or steering modules is not. If multiple critical systems drop out, do not drive.

Related OBD2 codes